In all fairness. Shadow is pretty strong in PVP atm, in PVE we are kinda strong in certain fights like Elegon.
What i personally feel where lacking atm is decent single target dps. Just annoying that Affliction is better in every aspect of PVE in live.
We had a problem on AOE fights, but it seems like the PTR is gonna fix that with the MS buff. All together i'm not too worried about Shadow's future as long as the developers keep an eye out.